88 



anterior margin. A small white spot on valves three to eight. 

 Slightly beaked. Under one-inch objective this area is closely 

 ribbed with wavy longitudinal riblets. Slits two each side, 

 eaves very spongy, teeth propped. 



Girdle. — Broad, under pocket lense leathery, same red colour 

 as valves, fringed at margin. Under one-inch objective is seen 

 to be densely clothed with evenly packed, long, linear scales or 

 spicules. These are arranged in rows, the apices curving across 

 to the next row. 



Measurement. — Length, 16 mm.; breadth, 10 mm. 



Habitat. — Dredged St. Vincent's Gulf by Dr. Verco ; one 

 specimen only. 



Remarks. — In general appearance this species closely resembles 

 the bright red form of Chiton tricostalis, but on closer inspection 

 the sculpture is seen to be widely different. The ornamentation 

 in some respects approximates to Callochiton platessa, but that 

 species is much more strongly pitted or decussated, and the longi- 

 tudinal scimitar-shaped sulci are absent ; also it is more strongly 

 beaked than the species now described. Only one specimen has 

 been obtained, and only the insertion plates of the first two 

 valves have been examined. 



